Title :
A Simple Defected Ground Structure with Elliptical Lowpass filtering Response
Author :
Parui, Susanta Kumar ; Das, Santanu
Author_Institution :
Dept. of Electron. & Telecommun. Eng., Bengal Eng. & Sci. Univ., Howrah
Abstract :
A new defected ground structure (DGS) consisting of three numbers of circular slots connected by two thin slots underneath a microstrip line is proposed. Both simulated and measured S-parameter results shows a very sharp lowpass filtering characteristics with one number of pole and one number of zero at finite frequencies. Thus DGS unit is modeled by 3nd order elliptical lowpass filter. Cascading two cells under microstrip line realize a 3-pole lowpass filter. By replacing simple microstrip line by HI-LO line, improved filter performance is obtained.
Keywords :
low-pass filters; microstrip filters; microstrip lines; 3-pole lowpass filter; 3nd order elliptical lowpass filter; circular slot; defected ground structure; elliptical lowpass filtering response; microstrip line; Attenuation; Capacitance; Cutoff frequency; Electronic mail; Filtering; Frequency measurement; Inductance; Microstrip filters; Microwave filters; Poles and zeros; defected ground structure; elliptical response; microstrip filter;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554662
